Mixing-chamber.



L. ROSENBAUM. MIXING CHAMBER. APPLICATION FILED JUNE 2, 100a.

90%,087, Patented Nov. 17, 1908.

30 stant 55 cation are practically the same LOUIS ROSENBAUM, OF ST. LOUIS, MI S SOURI.

MIXING-CHAMBER.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application filed June 2, 1906. Serial No. 319,895.

To all whom it ma concern:

Be it known tl; l', Louis Rosnxnauat, a citizen of the Uni States, residing at the city of St. Louis, State of Missouri, have in 5 vented a certain new and useful Improvement in Mixing-Chambers, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof, in which Figure 1 is a side elevational view, partly in section, showing my improved mixing chamber applied to a gas sad iron; and Fig. 2 is a sectional view through the mixing chamber on the line 2-2, Fig. 1.

This invention relates to a new and useful improvement in mixing chambers for gasburnin devices.

. Whife I herein show and describe my inrproved mixing chamber as applied to a gas sad iron, nevertheless it is to be understood that my mixing chamber can be equally well applied to gas stoves and other devices burning gas.

The object of my invention is to provide a construction of the kind described wherein the cold air and gas are thoroughly mixed and commingled; whereby the supply of cold air for the burner for promoting comj bustion therein is rendered steady and conand whereby mixed hot air and gas from the burner is not permitted to escape into or through the mixing chamber to the atmosphere, thus preventing waste of gas and -'correspondingly increasing the burning and heating qualities of the sad iron or other apparatus.

\Vith this object in view, my invention consists in the novel construction, arrangement, and combination of the several parts,

40 all as will hereinafter be fully described and pointed out in the claim.

Referring to the drawings, in which like numerals of reference refer to like parts throughout the several views, '1 indicates the base casting of the gas sad iron, which is preferably a hollow metallic casting; 2 is the handle-plate; and 3 is the burner, which is adapted to fit within said base casting 1. The base 1 and handle-plate 2 are connected by the screw-threaded pipe 4, which, at the same time, provides a communicating passage between the mixing chamber and burner. As the details of construction of the gas sad iron proper shown in this applias in the iron shown in. Letters Patent No. 823,190, issued to me June 12, 1906, further description thereof is not deemed necessary in this application.

5 indicates what might be termed a hot air and gas reservoir. This reservoir or chamber 5 is preferably cast integral with the handle-plate 2, but. it is obvious that it might equally well be in the form of a separate casting. This chamber 5 is closed on all sides, except as hereinafterdescribpd, and is formed'relatively large in diameter at its top and gradually decreases in diameter towards its base, where it leads into the pipe -l communicating with the burner 3.

6indicatesthemixingchamberproper which consists preferably of an enlarged hollow spherical portion 6 and a hollow elongated extension or pipe portion (5. At about where the pipefi merges into said spherical portion (i it is externally threaded and is adapted to fit in a threaded opening in the topof said chamber 5, the pipe 6 as shown in Fig. 1, extending for some distance down into said chamber Extending transversely through said spherical portion (3 see Fig. 1, is a series of air-inlet openings 6, through which air enters said mixing chamber, and in the top of said portion 6 is a threaded opening (5, into which is threaded an ordinary gas cock 7.1eading to some suitable source of gas supply (not shown). The nozzle 8 of said gas-cock 7 extends down into said spherical portion (5 of the mixing chamber slightly below the said air-inlet openings 6" and the gas opening therein is of very small diameter, for \VQlll1D(liStOOLi purposes.

In operation, the gas enters the spherical portion (3 of the mixing chamber through the nozzle 8, in which chamber or portion 6 it comminglcs with the air entering through the perforations (3", the mixed cold air and gas, due to the weight of the cold air. then passing down, as indicated by the unfeathered arrows. through the pipe (3, in which pipe the cold air and gas are given further opportunity to become thormighly mixed, through the chamber 5 and pipe ii: to the burner 3, from which the mixed air and gas are projected directly upon the bottom of the base casting 1.

Now I have found from experience that in practically all irons with which I am familiar, there is a certain amount of hot air and gas, sulting from various causes, which tends to escape from the burne outwardly through in the burner becomes so large that, having no further room to expand therein, it chokes up: the passage from the mixing chamber to the burner and thus prevents the entrance of the necessary cold air to theburnerto supply oxygen for good combustion, thus causing the iron to burn with an odorous white flame.

' as the cold air and said pipe 6 These several defects are, of course, objectionable, and to obviate them I provide my improved construction herein described. The cold air and gas from the mixing chamber, in passing down to the burner 3, will take the center path through the pipe 4, and should there be any back pressure or tendency of thehot air and gas to escape from the burner, the hot'air and gas will, in passing up throughthe pipe 4:, as shown by the feathered arrows, hug the sides thereof and pass up into the chamber or reservoir 5, where the hot air and gas are given an opportunity to expand and in which a circulation is produced, the mixed air and gas, as they cool, being led back into the burner for consumption. Possibly due to the fact that as passing down through the extension 6 chi l the sides of said pipe 6 to a certain extent, the hot air and gas within the reservoir touching against the sides of will become cooler, or as the air and gas within the reservoir will also become cooler on being removed from the burnerthe source of heator from other causes, a circulationis'produced in the reservoir or chamber 5, the cooler air and gas the incoming ing chamber.

By the use of the term cold air I mean cold air and gas from the mix-.

'is not retarded, but is eoaoev the atmospheric or other air first entering the mixing chamber, and by the term hot air I mean to designate heated or hot air, such as the air 5 from the burner, as shown in Fig, 1.

By this construction, escape of hot air and gas from the burner through the mixing chamber to there is practically no waste of gas; flashing back of jets of flame into the mixing chamber is prevented; the supply of gas and cold air to the burner from the mixing chamber steady and constant; and the burning and heating qualities of the gas -burning device on which my mixing chamber is employed are made more perfect. I have found that with this improved mixing chamber and hot air reservoir the burning and heating qualities of gas sad irons are increased many times.

Having thus described my invention, what I claim' and desire to secure by Letters Patent is:

passing up into the reservoir the atmosphere is prevented;

In a gas iron, the combination with a hollow base, of a hollow burner fitting therein and having a gas-inlet opening in its top and perforations in its bottom, a pipesection fitting insaid inlet-opening in said burner and extending up through the top of said base, a handle-plate for said base, a

mixed air and gas reservoir on saidhandleplate and opening into said pipe-section, and a mixing chamber for cold air and gas arranged above said reservoir and having an elongated hollow portion extending down within said reservoir close to said pipe-section; substantially as described.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses. therein being led back into the burner with LOUIS ROSENBAUM.

Witnesses I v ERNST H. VoLLRA'rn, EDGAR W. JAooBs. 

